// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// This file contains the implementation of TegraV4L2Device used on
// Tegra platform.

#ifndef MEDIA_GPU_TEGRA_V4L2_DEVICE_H_
#define MEDIA_GPU_TEGRA_V4L2_DEVICE_H_

#include <stddef.h>
#include <stdint.h>

#include "base/macros.h"
#include "media/gpu/v4l2_device.h"
#include "ui/gl/gl_bindings.h"

namespace media {

// This class implements the V4L2Device interface for Tegra platform.
// It interfaces with libtegrav4l2 library which provides API that exhibit the
// V4L2 specification via the library API instead of system calls.
class TegraV4L2Device : public V4L2Device {
public:
    TegraV4L2Device();

    // V4L2Device implementation.
    bool Open(Type type, uint32_t v4l2_pixfmt) override;
    int Ioctl(int flags, void* arg) override;
    bool Poll(bool poll_device, bool* event_pending) override;
    bool SetDevicePollInterrupt() override;
    bool ClearDevicePollInterrupt() override;
    void* Mmap(void* addr,
        unsigned int len,
        int prot,
        int flags,
        unsigned int offset) override;
    void Munmap(void* addr, unsigned int len) override;
    std::vector<base::ScopedFD> GetDmabufsForV4L2Buffer(
        int index,
        size_t num_planes,
        enum v4l2_buf_type buf_type) override;
    bool CanCreateEGLImageFrom(uint32_t v4l2_pixfmt) override;
    EGLImageKHR CreateEGLImage(
        EGLDisplay egl_display,
        EGLContext egl_context,
        GLuint texture_id,
        const gfx::Size& size,
        unsigned int buffer_index,
        uint32_t v4l2_pixfmt,
        const std::vector<base::ScopedFD>& dmabuf_fds) override;
    EGLBoolean DestroyEGLImage(EGLDisplay egl_display,
        EGLImageKHR egl_image) override;
    GLenum GetTextureTarget() override;
    uint32_t PreferredInputFormat(Type type) override;

    std::vector<uint32_t> GetSupportedImageProcessorPixelformats(
        v4l2_buf_type buf_type) override;

    VideoDecodeAccelerator::SupportedProfiles GetSupportedDecodeProfiles(
        const size_t num_formats,
        const uint32_t pixelformats[]) override;

    VideoEncodeAccelerator::SupportedProfiles GetSupportedEncodeProfiles()
        override;

    bool IsImageProcessingSupported() override;

    bool IsJpegDecodingSupported() override;

private:
    ~TegraV4L2Device() override;

    bool Initialize() override;

    bool OpenInternal(Type type);
    void Close();

    // The actual device fd.
    int device_fd_ = -1;

    DISALLOW_COPY_AND_ASSIGN(TegraV4L2Device);
};

} //  namespace media

#endif // MEDIA_GPU_TEGRA_V4L2_DEVICE_H_
